What is one of the four major causes of avionics corrosion?

Corrosion in avionics is a significant concern, and understanding its causes is essential for maintenance and safety. One of the major causes relates to the presence of a metal that has the tendency to corrode, often referred to as the anode in electrochemical terms. When a metal is prone to corrosion, it becomes an anode in a galvanic cell setup, where it donates electrons to another metal that serves as the cathode. This difference in reactivity between metals can lead to accelerated corrosion of the anode, especially in environments where moisture is present.

Components that are more prone to corrosion due to their material properties can initiate the corrosive process, especially when they are used in conjunction with other metals and electrolytes. The tendency of a metal to corrode is influenced by its electrochemical properties, making it critical to account for an electrically active anode in any setup. The anode's susceptibility to corrosion can result in structural failure if not properly managed, highlighting its role as a primary factor in avionics corrosion.

Understanding the influence of an anode is crucial for the prevention and control of corrosion in aircraft systems, reinforcing the importance of selecting appropriate materials and applying protective measures.